Improvement in capstans



A. RUSSELL.

I Caps'tan. Y No 167 693l Patentedsept.14,1s75.

Iig

UNITED STATES.A

PATENT Cirrfriona ALBERT RUSSELL, OF NEWBURYPOBT, MASSACHUSETTS.

IMPROVEMENT l-IN CAPSTANS.

Specification forming part of Letters Patent N o. 167,693, dated September 14,l 187,5; application filed June 1, 1875.

To all whom t may concern:

Be it known that I, ALBERT RUSSELL, of Newburyport, of the county of Essex' and State of Massachusetts, have invented a new and useful Improvement in Gapstans; and do herebyT declare the same to be fully described in the following specification and represented in the accompanying drawings, of which- Figure l is a side elevation, and Fig. 2 a transverse section, of a capstan having my invention. Fig. 3 is a top view with the head removed. Fig. i is a transverse section of the pawl case or wheel, it being taken through the pawls thereof. Fig. 5 is a top view, and Fig. 6 a side view, of the stationary ratchet-wheel with which the pawls or lugs of the pawl-wheel operate. Fig. 7 is a section of the head, taken through one of its pawls or lugs.

My invention relates to or consists in a special combination of mechanical devices to cause the barrel of the capstan to revolve in one direction,whetl1er the capstan-head be revolved in one way or the opposite.

In the said drawings,Arepresents the body or barrel of the capstan, as arranged concentrically on an upright shaft, B, and provided at its lower part with a series of pawls7 C C, to engage With a horizontal ratchet, D, of a base, E, from Whose center the .shaft B extends perpendicularly. The barrel of the capstan is chambered in its upper part, as shown at a, and has upon its top a series of ratchetteeth, b-b b b', arranged, as shown, to-co-operate with two vertically-sliding lugs or pawls, c c, arranged in the capstan-head F, so as to freely play or move up and down thereon. The said head is free to revolve on the shaft B, and is provided with a pinion or gear, d, fixed to it, so as to revolve with it. This pinion extends into a wheel or rotary pawl-case, G, arranged concentrically with the said pinion, and applied to the shaft B, so as to be capable of freely revolving thereon. The pinion engages with one or two gears, e c, carried by and projecting from the rotary case or wheel G, and made to engage'with an internal gear, f, fixed on the upper part of the capstan-barrel. Two pawls, g g, beveled at their lower ends, slide freely and vertically withinv the case G, and engage with a stationary ratchet-wheel, H, which is fixed on the shaft B, andarranged as represented.

On revolving the head F, so as to carry its pawls c c against the vertical ends of two of the teeth, b, the capstan-barrel will be rebe revolved in a direction opposite to that ofy the head, or in the same direction the said barrel was previously revolved by the head,

its pawls, and ratchet-wheel.

By having the pawls of the wheel G, or the capstan-head, slide or play vertically therein, there is no necessity of pivoting them thereto, and thus we avoid the danger of pivots being cut off or broken under great strain of the capstan-barrel, the pawls being supported in and by vertical chambers k l made in the capstan-head and in the pawl-case.

Each of the said pawls c is slotted vertically, and held from dropping out of its chamber by the slot and a pin going through the slot and into the head F, the same being shown in Fig. 7

In my capstan it will be seen that there is a ratchet-wheel,`H, xed directly to the shaft B and under the frarneG, to which latter pawlsv g g-areapplied to operate with the ratchet, all of which differs from anything shown in either of the United States Patents Nos. 58,069, 51,107, and 98,032, and is productive of new and useful results. Furthermore,

I'have the vertically-sliding pawls, slotted, v

and held in their chambers by pins going through the slots, which is not shown in either of said patents. nected with the head, even when it may be olf the barrel.

I am aware that in the head of a capstan locking-bolts furnished with inclined lifters havebeen used, such being to engage the head with the barrel, notched or recessed on its upper end to receive such bolts, all of which differs from the pawls c and ratchet-teeth Z1, which automatically operate to engage the head and barrel, andv disengage the two, for

The pawls are always concapstan-head F, barrel A, and shaft B, and consisting1 of the gear d and one or more paw1s,c, applied to the head, the Wheel Gr, its gear or gears e, and one or more pawls, g, the stationary ratchet-wheel H, fixed to the shaft B, and the internal gear f and the range of ratchet-teeth b applied to the barrel, all being arranged substantially as specified.

ALBERT RUSSELL.

Witnesses:

R. H. EDDY, J. R. SNOW. 

